Installing 2FA Addin for Kaseya fails on Kaseya 6.3 (Legacy)

Note: This KB article originally applied to the controlled release of Kaseya v6.3. If you are running the full release of Kaseya 6.3 you may wish to review the KB article titled: 2FA Addin fails to install on Kaseya 6.3.

Issue

When installing the 2FA Addin for Kaseya on the controlled release of Kaseya 6.3 you see this error message: "This Addin requires version 6.x of the Kaseya server. Setup will now exit"

Cause

The installer is looking for a regkey which has been modified on 64-bit Kaseya installs, between versions 6.2 and 6.3.

Resolution

Our installer is expecting the value vsaPres to obtain the Kaseya version number, previously located here: